%0 Journal Article
%T An Ecological study on earthworm in farmland of salinity transforming area in north China plain<br>华北盐渍化改造区农田蚯蚓生态学研究——以河北省曲周县为例
%A WU Wen-Liang
%A <br>吴文良
%J 生态学报
%D 2001
%I 
%X Soil environment has been greatly improved through transforming saline alkali land in Quzhou county, Hebei Province. Earthworms in this area are relatively abundant and there are 3 families, 6 genera and 6 species. Allolobophora trapezoides, Eisenia foetida of Lumbricidae and Drawida japonica of Moniligastridae are the dominant species. The average population density of earthworms is 16.53 /m 2, and the biomass is 4.81 g/m 2. This has reached normal level of farming ecosystem. It showed by the age structure that the population structure of local earthworms is in a stable situation. The number of earthworms during the year is in the order of summer>early spring>autum.
%K salinity transforming region
%K farmland ecosystem
%K earthworms<br>盐渍化改造区
%K 农田生态系统
%K 蚯蚓
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=1C1B40B418A1EA5C&yid=14E7EF987E4155E6&vid=659D3B06EBF534A7&iid=DF92D298D3FF1E6E&sid=8DABBEB130EFF191&eid=0EFDF9DD0F63E842&journal_id=1000-0933&journal_name=生态学报&referenced_num=6&reference_num=8